Restriction maps of two alleles of the cystic fibrosis gene are shown below. the restriction enzyme ecor1 cuts the normal allele at the site indicated with a vertical arrow.
which fragment(s) would be detected on an electrophoresis gel following ecor1 digestion of the region from a person who is heterozygous for the two alleles? (picture atached)
1 kb only
4 kb only
5 kb only
1 and 4 kb only
1, 4, and 5 kb

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.